CVE-2017-3733 in the critical feed json
Encrypt-Then-Mac renegotiation crash
published 2017-05-04 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-12850
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 12.9%
- EPSS 12.9% chance of exploitation in 30 days, percentile 96%
- public exploits
- 0
- none known
Summary
During a renegotiation handshake if the Encrypt-Then-Mac extension is negotiated where it was not in the original handshake (or vice-versa) then this can cause OpenSSL 1.1.0 before 1.1.0e to crash (dependent on ciphersuite). Both clients and servers are affected.
Patch / fix
- openssl Debian 14, Debian 13, Debian 12 1.1.0e-1
debian advisories DEBIAN-CVE-2017-3733
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
red hat product security vex CVE-2017-3733 updated cvss 5.9
openssl: Encrypt-Then-Mac renegotiation crash
-
Red Hat Enterprise Linux 5 openssl, openssl097a Red Hat Enterprise Linux 6 openssl, openssl098e, openssl-perl Red Hat Enterprise Linux 7 OVMF, openssl, openssl098e, openssl-libs, openssl-perl Red Hat Enterprise Virtualization 3 mingw-virt-viewer, mingw32-virt-viewer, mingw64-virt-viewer Red Hat JBoss Core Services jbcs-httpd24-openssl Red Hat JBoss Enterprise Application Platform 5 opensslnot affected: vulnerable code not present
+4 more productsfewer
Red Hat JBoss Enterprise Application Platform 6 openssl Red Hat JBoss Enterprise Web Server 1 openssl Red Hat JBoss Enterprise Web Server 2 openssl Red Hat JBoss Web Server 3 openssl
Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf
Exploit prediction
12.87% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Affected products
- OpenSSL OpenSSL
Classification
- Weakness
-
- CWE-20 Improper Input Validation
- Technology feeds
References
- github.com /openssl/openssl/commit/4ad93618d26a3ea23d36ad5498ff4f59eff3a4d2
-
openssl.org
/news/secadv/20170216.txt
vendor-advisory
-
securityfocus.com
/bid/96269
vdb-entry, third-party-advisory
- oracle.com /technetwork/security-advisory/cpujan2018-3236628.html
-
h20566.www2.hpe.com
/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbgn03728en_us
third-party-advisory, vdb-entry
- oracle.com /technetwork/security-advisory/cpuoct2017-3236626.html
-
securitytracker.com
/id/1037846
vdb-entry
- oracle.com /technetwork/security-advisory/cpuapr2019-5072813.html
Sources
- CVE List CVE-2017-3733
- NVD CVE-2017-3733
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.